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$81+ Cheap flights from South Dakota to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — ORD
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
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Cheap flight deals from South Dakota to Illinois

Cheapest flights from South Dakota to Illinois
Explore the most affordable flight options available from South Dakota to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

This American Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:29 pmFSD - ORD
Nonstop2h 01mAmerican Airlines
Sat 1/34:48 pmORD - FSD
Nonstop1h 52mAmerican Airlines
Deal found 12/15$219
This American Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:29 pmFSD - ORD
Nonstop2h 01mAmerican Airlines
Fri 1/25:21 amORD - FSD
1 stop7h 18mAmerican Airlines
Deal found 12/15$259
This United Airlines deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:30 amFSD - ORD
Nonstop2h 00mUnited Airlines
Thu 12/257:55 pmORD - FSD
Nonstop2h 01mUnited Airlines
Deal found 12/14$279
This American Airlines deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1410:43 amFSD - ORD
Nonstop1h 53mAmerican Airlines
Fri 1/99:50 amORD - FSD
Nonstop2h 01mAmerican Airlines
Deal found 12/13$289
This American Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:41 amFSD - ORD
Nonstop1h 54mAmerican Airlines
Sat 1/34:48 pmORD - FSD
Nonstop1h 52mAmerican Airlines
Deal found 12/16$304
This Delta deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:14 pmRAP - STL
1 stop5h 02mDelta
Thu 1/85:25 pmSTL - RAP
1 stop6h 03mDelta
Deal found 12/15$304
This Delta deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1611:00 amFSD - STL
1 stop5h 49mDelta
Mon 12/2211:59 amSTL - FSD
1 stop3h 46mDelta
Deal found 12/15$309
This Delta deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/198:01 amFSD - STL
1 stop4h 03mDelta
Sun 12/216:05 amSTL - FSD
1 stop4h 21mDelta
Deal found 12/16$319
This American Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2010:46 amFSD - ORD
Nonstop1h 54mAmerican Airlines
Sun 12/218:15 amORD - FSD
Nonstop2h 01mAmerican Airlines
Deal found 12/15$334
This Delta deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/145:14 amFSD - ORD
1 stop3h 26mDelta
Fri 1/96:15 amORD - FSD
1 stop6h 07mDelta
Deal found 12/13$354
This United Airlines deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/203:08 pmFSD - ORD
Nonstop2h 02mUnited Airlines
Sat 12/208:08 pmORD - FSD
1 stop23h 52mUnited Airlines
Deal found 12/14$374
This United Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:11 amRAP - STL
2 stops7h 07mUnited Airlines
Thu 1/811:20 amSTL - RAP
2 stops8h 54mUnited Airlines
Deal found 12/15$384

Find flight deals from South Dakota to Illinois

Keep the following information in mind while searching for South Dakota to Illinois flight deals. Data was last updated December 16, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$189
(United Airlines)

One-way from

$81
(Frontier)

Popular in

June

Cheapest in

September

Average price

$324

Good round-trip deal

$341 or less

Good one-way deal

$255 or less
Provider with most accurate pricing for Sioux Falls Joe Foss Field-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sioux Falls Joe Foss Field-Chicago (CHI) flights.
Search Deals
From South Dakota to Illinois
Search Deals
One-way flight from South Dakota to Illinois
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from South Dakota to Illinois.
Search Deals
Price to beat on a one-way flight from South Dakota to Illinois.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from South Dakota to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 16, 2025.
Use the filters below to find and compare flights from South Dakota to Illinois that are best for you.

Fly from

South Dakota

Fly to

Illinois

Route

Depart

Return

Price

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Sat 1/10

3:11 pm-5:10 pm

Nonstop1h 59m

Chicago O'Hare Intl

Mon 1/12

7:58 pm-9:50 pm

Nonstop1h 52m

$189

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 2/13

7:52 pm-9:40 pm

Nonstop1h 48m

Chicago O'Hare Intl

Sun 2/15

3:58 pm-5:47 pm

Nonstop1h 49m

$193

Sioux FallsChicago

FSD - MDW

FSDMDW

Sioux Falls Joe Foss Field

Thu 1/29

1:02 pm-6:36 pm

1 stop5h 34m

Chicago Midway

Mon 2/2

1:51 pm-7:53 pm

1 stop6h 02m

$209

Sioux FallsChicago

FSD - MDW

FSDMDW

Sioux Falls Joe Foss Field

Wed 2/18

5:00 am-9:06 am

1 stop4h 06m

Chicago Midway

Sat 2/21

11:45 am-3:35 pm

1 stop3h 50m

$209

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 2/20

1:00 pm-6:01 pm

1 stop5h 01m

Chicago O'Hare Intl

Wed 2/25

8:52 am-12:15 pm

1 stop3h 23m

$209

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 1/30

1:02 pm-5:55 pm

1 stop4h 53m

Chicago O'Hare Intl

Sun 2/1

6:15 am-12:22 pm

1 stop6h 07m

$209

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Tue 1/13

5:00 am-8:40 am

1 stop3h 40m

Chicago O'Hare Intl

Tue 1/20

8:50 am-12:22 pm

1 stop3h 32m

$209

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Thu 1/29

1:02 pm-5:55 pm

1 stop4h 53m

Chicago O'Hare Intl

Mon 2/2

6:15 am-12:22 pm

1 stop6h 07m

$209

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Thu 1/22

1:02 pm-5:55 pm

1 stop4h 53m

Chicago O'Hare Intl

Mon 1/26

6:15 am-10:22 am

1 stop4h 07m

$209

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 2/20

1:00 pm-6:01 pm

1 stop5h 01m

Chicago O'Hare Intl

Sun 2/22

6:15 am-10:08 am

1 stop3h 53m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 59 results
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Best time to book a flight from South Dakota to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from South Dakota with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from South Dakota to Illinois

What is the cheapest month to book a flight from South Dakota to Illinois?

Currently, March is the cheapest month in which you can book a flight from South Dakota to Illinois (average of $187). Flying from South Dakota to Illinois in June is currently the most expensive (average of $224). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SD to IL?

Find hourly flight availability from South Dakota to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 16, 2025.

It’s typically best to fly out from South Dakota to Illinois in the evening. Doing so could potentially save you 22% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from South Dakota to Illinois?

Use this chart to determine the cheapest time to fly round-trip from South Dakota to Illinois. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their South Dakota to Illinois flight should consider departing on Monday mornings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated December 16, 2025.
Read through reviews of airlines operating flights from South Dakota to Illinois, such as Denver Air Connection, Delta, and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Denver Air Connection
8.7
Very good

Food

8.4

Comfort

8.9

Boarding

8.7

Overall

8.7

Entertainment

8.1

Crew

9.4
Denver Air Connection
8.7
Very good
Denver Air Connection
8.7
Very good

Food

8.4

Comfort

8.9

Boarding

8.7

Overall

8.7

Entertainment

8.1

Crew

9.4
Delta
7.9
Good
8,008 reviews
Denver Air Connection
8.7
Very good

Food

8.4

Comfort

8.9

Boarding

8.7

Overall

8.7

Entertainment

8.1

Crew

9.4
United Airlines
7.4
Good
9,094 reviews
Denver Air Connection
8.7
Very good

Food

8.4

Comfort

8.9

Boarding

8.7

Overall

8.7

Entertainment

8.1

Crew

9.4
American Airlines
7.2
Good
11,047 reviews
Denver Air Connection
8.7
Very good

Food

8.4

Comfort

8.9

Boarding

8.7

Overall

8.7

Entertainment

8.1

Crew

9.4

Related info for your journey

Find useful and relevant information for your journey from South Dakota to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from South Dakota to Illinois?

    Airlines like United Airlines, American Airlines, and Delta fly from South Dakota to Illinois in about 1h 48m. The time it takes to get you to your destination can typically vary by up to 3h 46m. Airlines will cover a distance of 461 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from South Dakota to Illinois one-way?

    One-way options have recently been found by users for as low as $84 on Denver Air Connection. Other airlines that offer cheap prices include American Airlines from $125 and United Airlines from $144 one-way.

  • Can I find deals for flights from South Dakota to Illinois that include hotel bookings?

    Yes. In addition to deals on South Dakota to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from South Dakota to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from South Dakota to Illinois.

  • Can I find deals for business class flights from South Dakota to Illinois?

    Yes. Cheapflights offers flight deals from South Dakota to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from South Dakota to Illinois?

    Currently, March is the cheapest month in which you can book a flight from South Dakota to Illinois (average of $187). Flying from South Dakota to Illinois in June is currently the most expensive (average of $224). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for South Dakota to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from South Dakota to Illinois

Discover the top 4 airlines that operate flights from South Dakota to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$178Average$194FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$189Average$222FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$189Average$330FlexibilityNo cancel feeOn-time69%
DeltaCheapest$208Average$278FlexibilityNo cancel feeOn-timeN/A

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